US4715623A - Documents having a revealable concealed identifier and the method of making such documents - Google Patents
Documents having a revealable concealed identifier and the method of making such documents Download PDFInfo
- Publication number
- US4715623A US4715623A US06/655,713 US65571384A US4715623A US 4715623 A US4715623 A US 4715623A US 65571384 A US65571384 A US 65571384A US 4715623 A US4715623 A US 4715623A
- Authority
- US
- United States
- Prior art keywords
- foreground
- areas
- intaglio
- ridges
- pattern
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- 239000000758 substrate Substances 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000002310 reflectometry Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 12
- 230000001154 acute effect Effects 0.000 claims 1
- 230000004048 modification Effects 0.000 description 10
- 238000012986 modification Methods 0.000 description 10
- 230000000873 masking effect Effects 0.000 description 7
- 238000005286 illumination Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 241000156978 Erebia Species 0.000 description 1
- 239000004775 Tyvek Substances 0.000 description 1
- 229920000690 Tyvek Polymers 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/29—Securities; Bank notes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
- B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
- D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/02—Patterned paper
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
-
- B42D2035/34—
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y10T428/2457—Parallel ribs and/or grooves
Definitions
- Hutton et al. U.S. Pat. No. 4,033,059 shows a method of printing documents including transitory images.
- the transitory images of that patent are printed in ink lines which contrast in color with the underlying paper or other substrate.
- the images in certain embodiments of that invention are invisible when viewed perpendicularly to the plane of the paper, but appear when viewed at a small angle to the plane of the paper. Such images are termed “latent images”.
- the images are visible when viewed along a line of sight perpendicular to the plane of the paper, but disappear when viewed at a small angle. In that case, the images are termed "transient images”.
- the term "transitory image” is defined in the Hutton et al. patent as a generic term inclusive of both latent and transient images.
- a stock material for producing documents of value is produced by impressing an uninked intaglio printing plate against a surface of a printable substrate, thereby producing in that surface an intaglio identifier pattern.
- That pattern includes foreground areas having a distinctive intaglio pattern of ridges and grooves.
- the patterns of the foreground areas may differ from each other.
- the ridges and grooves of each foreground area are straight and parallel.
- Each foreground area is completely surrounded by a background area having an intaglio pattern of ridges and grooves which are distinctively different from and preferably perpendicular to the ridges and grooves in the enclosed foreground area.
- the concealed identifier pattern may be observed only as a contrast in reflectivity of the foreground and background areas. That contrast may be observed along a line of sight that makes an angle with the plane of the substrate which lies within a first limited range of angles. Furthermore, the orientation of the line of sight with respect to the parallel intaglio lines of the foreground areas must be within a second limited range of angles. Hence, the identifier pattern is readily observable only by an observer who is informed as to the particular pattern he is looking for and as to both of the limited ranges of angle in which the identifier pattern may be recognized.
- the identifier pattern may include a masking pattern of curved lines which cross the straight lines of the identifier pattern and which tend to obscure that identifier pattern and make it difficult for an observer to see it.
- a document may be printed thereon with ink which contrasts with the color of the foreground and background areas of the substrate.
- the printed matter should discontinuously overlap the identifier pattern and be out of register with it. This printed matter makes it additionally difficult to recognize the intaglio identifier pattern. Any method of printing the document may be used, including intaglio, letterpress, offset, silk screen, flexographic, etc.
- the degree of concealment of the intaglio pattern in the finished document may be controlled, e.g., by controlling the specularity of the substrate material. It may be made difficult to see without special instruction, but nevertheless observable without optical aid by a trained person. This degree of concealment may be desirable, for example, in the case of labels of relatively expensive goods, where counterfeiting might be expected, and where inspection to detect such counterfeiting may be made carefully. In other cases, such as labels for relatively inexpensive goods, the intaglio pattern may be made readily observable simply for the purpose of providing a distinctive and attractive label.
- FIG. 1 is a plan view of a sheet of paper on which has been impressed a revealable concealed identifier pattern in accordance with the invention.
- FIG. 2 is a cross-sectional view taken on the line 2--2 of FIG. 1, on an enlarged scale.
- FIG. 3 is a cross-sectional view taken on the line 3--3 of FIG. 1, also on an enlarged scale.
- FIG. 4 is a fragmentary perspective view of a portion of the sheet of FIG. 1, on an even more enlarged scale than FIGS. 2 and 3.
- FIG. 5 is a diagrammatic view showing an eye inspecting the sheet of FIG. 1, with the long dimension of the sheet at right angles to the line of sight.
- FIG. 6 is a perspective view showing the sheet of FIG. 1 as seen by the eye of FIG. 5, with the concealed identifier pattern revealed.
- FIG. 7 is a view similar to FIG. 6, but with the sheet rotated 90°, so that the eye observes it at a different angle of orientation.
- FIG. 8 is a view similar to FIG. 5, but with the sheet back-lighted.
- FIG. 9 is a view similar to FIG. 6, showing the sheet and the identifier pattern as viewed by the eye of FIG. 8.
- FIG. 10 is a view similar to FIG. 4, showing a modification of the invention.
- FIG. 11 is a view similar to FIG. 6, showing the modification of FIG. 10 as viewed from a low angle.
- FIG. 12 is a view similar to FIG. 4, showing a modified embodiment including a masking pattern.
- FIG. 13 is a view as in FIG. 5, but with certain angles identified.
- FIG. 14 is a plan view of the sheet of FIG. 13, with certain angles of sheet orientation identified.
- FIG. 15 is a diagrammatic view showing apparatus for impressing an intaglio pattern on a laminated sheet.
- FIG. 16 is a diagrammatic view showing the printing of an overprint on the laminated sheet which was intaglio printed in FIG. 15.
- FIG. 17 shows a plan view of a document which bears an invisible intaglio print and an overprint.
- FIG. 18 is a perspective view similar to FIGS. 4 and 9, on a greatly enlarged scale, showing another modification.
- FIG. 19 is a view similar to FIG. 6, showing the modification of FIG. 18, as viewed from one angle.
- FIG. 20 is a view similar to FIG. 7, showing the modification of FIG. 18, as viewed from another angle.
- FIG. 21 is a diagrammatic view illustrating another embodiment of the invention.
- FIG. 22 is a plan view, on an enlarged scale, of an intaglio printing plate intended for the printing of a revealable concealed identifier, employing a masking image according to a modification of the invention.
- FIG. 23 is a fragmentary cross-section taken on the the line 23--23 of FIG. 22.
- FIG. 24 is a plan view on an enlarged scale showing a portion of a document printed with an intaglio plate. The plate does not conform to the plate of FIGS. 22 and 23.
- FIG. 25 is a fragmentary cross-section take on the line 25--25 of FIG. 24.
- FIGS. 2 and 3 are cross-sectional views showing intaglio patterns of ridges and grooves which are impressed upon the sheet 1 without inking.
- the ridges are raised from the general plane of the paper, the bottom of the grooves are at the same elevation as that general plane, as best seen in FIGS. 2 and 3.
- the ridges within the outline of the letter X extend vertically of FIG. 1, as may be seen at la in FIGS. 2 to 4.
- the ridges outside the outline of the letters X and Z extend horizontally of FIG. 1, as shown at lb in FIGS. 2 to 4.
- the substrate 1 of paper While it is presently preferred to make the substrate 1 of paper, other suitable substrates may be employed, as long as they may be deformed by a conventional intaglio process.
- the word "paper” as used in this specification, is intended to be inclusive of such other, paper-like materials, resembling true paper in form and use. As explained below in connection with FIGS. 15 and 16, laminated paper may be used, in which case the intaglio grooves are deeper.
- FIG. 5 illustrates diagrammatically a method of observing the intaglio pattern which is invisible when viewed along a line of sight perpendicular to the plane of the paper as shown in FIG. 1.
- the eye is looking at the sheet from a low angle and the line of sight is directed toward the source of illumination.
- FIG. 6 shows what the eye in FIG. 5 sees.
- the letters X and Z appear lighter than the rest of the sheet.
- the letters X and Z are hereinafter termed the "foreground areas" la of the intaglio pattern and the remainder of the sheet constitutes the "background areas" 1b of the pattern.
- the observed pattern is similar to that of FIG. 7, being the reverse of that of FIG. 6.
- the letters X and Z appear darker than the background area 1b.
- FIG. 11 shows how the sheet 5 looks when viewed from the same angle as in FIG. 5. The entire sheet appears light, the letters X and Z not being visible. If the sheet is turned as in FIG. 7, the letters X and Z appear as in that figure, being dark against a light background.
- the arrangement shown in FIG. 10, may be reversed, so that the foreground area has no intaglio imprint and the background areas have intaglio imprints.
- the appearance of the sheet as viewed in FIG. 11 would be the same. If the sheet is turned as in FIG. 7, the letters X and Z would appear light against a dark background. As long as the contrast in reflectivity is maintained, any area may be called a foreground area and any area of contrasting reflectivity may be called a background.
- This figure shows a modification of the invention including a sheet 10 with a foreground area 11 and background areas 12.
- the contrast between the foreground area 11 and the background area 12 comprise the revealable concealed identifier pattern. Concealment of that pattern is assisted in FIG. 12 by the concurrent use of a masking pattern consisting of curved lines 13, which cross the lines of the foreground area 11 and of the background area 12.
- a masking pattern consisting of curved lines 13, which cross the lines of the foreground area 11 and of the background area 12.
- the lines 13 illustrated in FIG. 12 appear as a random pattern of lines, it assists in the concealment of the foreground area 11 if the lines 13 form a regular pattern, for example, a stylized floral pattern.
- FIG. 13 illustrates the angles which must be employed to observe an identifier pattern constructed in accordance with the invention.
- a line of sight 14 makes the angle A with the plane of the sheet 1.
- the angle A may be controlled by controlling the depth and width of the lines in the intaglio printing plate.
- An observer, in order to detect the pattern must know the range of angles A at which the pattern is observable.
- the range of angles A is not critically limited. There is a best angle, but the pattern is observable from other angles within a certain range extending in each direction from (i.e., larger or smaller than) the angle A.
- range of angles is used broadly and in any particular case may represent two groups of angles having a particular characteristic and which are separated by another group of angles not having that characteristic.
- angles A there may be two or more angles A at which the pattern is observable. See FIG. 21 below.
- the establishment of angle A necessarily determines the angle B between the line of sight 14 and the line 15 between the source of illumination and the sheet 1. This determination arises from the fact that the angle of incidence of the light is equal to the angle of reflection (angle A) by a law of physics, so that angle B is equal to 180° less twice the angle A.
- FIG. 14 illustrates the angle at which the identifier pattern is observable with respect to the orientation of the sheet 1.
- the eye should look at the sheet along the line of sight 16, which is within a certain angle C of a line perpendicular to the ridges in the impressed intaglio foreground areas of the letters X and Z.
- the angle C is not critical for any particular pattern but extends over a substantial range.
- the angle D between the line of sight and the source of illumination is equal to 180° minus twice the angle C.
- FIG. 15 shows diagrammatically an apparatus for impressing an intaglio image on a laminated sheet 20 including a cover sheet 21, an adhesive layer 22 and a base sheet 23.
- the sheet 20 is fed between a pair of printing rollers, including a form roller 24 carrying a plate provided with an intaglio engraving 25 and an impression roller 26 which squeezes the laminated sheet 20 tightly against the form roller 24 so that the sheet 20 emerges with an intaglio impression 27 formed in its upper surface.
- the grooves of the intaglio engraving may be of any depth and width used in intaglio printing. It is presently preferred to use a depth of 0.0025" and to use 120 lines per inch.
- the sheet 20 with its intaglio impression 27 is subjected to a printing operation in which a printing roller 30 and an impression roller 31 acts on the sheet 20 and adds to its upper surface printed images, as shown at 32. These may be letters, numbers or other patterns. All dimensions of the sheets, the intaglio impression 27 and the printed images 32 are exaggerated in FIGS. 15 and 16.
- the finished sheet 20 is shown in FIG. 17 and includes the invisible intaglio impression 27 and the printed pattern 32 consisting of the word "ARGUS".
- the invention is not limited to the use of laminated sheets. However, if laminated sheets are used, the intaglio ridges formed in the paper will be higher than the ridges formed in a non-laminated sheet. In other words, the grooves between the ridges will be deeper.
- the laminated sheets may be used in the preparation of labels. In that case, the base sheet 23 is simply a protective sheet to cover the adhesive layer 22 so that after the intaglio impression and the visible printing, the base sheet 23 is stripped away from the adhesive 22. The label is then applied to the container by means of that adhesive.
- the intaglio identifier pattern is preferably repeated at frequent intervals or even in abutting arrays of the same pattern over the entire sheet. Such complete repetition of the pattern over the entire sheet avoids any problem of registry between the overprint 32 of FIG. 17 and the identifier pattern.
- FIG. 18 shows in perspective a modification of the invention in which a sheet 40 includes a square foreground area 41 and a circular foreground area 42.
- the square foreground area 41 is completely within a background area 43.
- the circular foreground area 42 is entirely within a background area 44.
- the intaglio ridges in the foreground area 41 are shown vertical as in FIG. 18 and the ridges in the background area 43 are shown horizontal.
- the foreground area 42 has horizontal ridges and the background area 44 has vertical ridges.
- the sheet 40 when observed from one direction, as in FIG. 19, shows a light square 41 against a darker background 43 and a dark circle 42 against a lighter background 44.
- the contrast in reflectivity reverses, so that the square 41 appears as a dark area surrounded by a lighter area 43 and the circle 42 appears as a light area surrounded by a darker background area 44.
- the particular ranges of angles shown are not the only possible ranges.
- the ranges of angles may be varied by changes in specularity, in depth of the grooves, and the width of the grooves in the intaglio plate.
- the angle of incidence is equal to the angle of reflection at any viewing angle.
- FIG. 23 illustrates on a greatly enlarged scale, an intaglio printing plate for use in impressing on a sheet of paper or other suitable substrate, a foreground area comprising the letter C, and shown by a series of vertical grooves 50 in the plate 51.
- the areas between the grooves represent the original surface of the plate, prior to engraving or chemical etching, and now constitute ridges 52, 53 in the surface of the plate, as best seen in FIG. 23.
- the ridges may be of different widths. See particularly the ridge 53, which is wider than the ridges 52.
- the horizontal grooves of the background area surrounding the letter C are illustrated at 55.
- Several different widths of grooves and ridges may be used in the identifier pattern 50 and in the masking pattern shown by the curved lines 54. The use of different widths of lines in the masking pattern makes the identifier pattern less readily observable.
- FIGS. 24 and 25 are identical to FIGS. 24 and 25.
- FIGS. 1-10 illustrate a sheet 60 on which an intaglio pattern has been impressed.
- the grooves in an intaglio plate produce ridges when a sheet 60 is forced against the plate.
- the raised ridges in the intaglio plate produce grooves 62 in the sheet 60.
- the paper or other material of the sheet 60 does not conform exactly to the intaglio plate, so that the ridges and grooves formed in the sheet 60 have rounded contours, whereas the ridges in the intaglio plate generally have sharp edges although the grooves themselves commonly have rounded contours.
- the contours involved are so small that minor variations in dimensions from one ridge to the next are not observed in the final product.
- identifier patterns illustrated have been known as comprising ridges and grooves which are distinguished from the surrounding background areas by a perpendicular relationship, that relationship is not absolutely necessary. Distinctive differences between the foreground and background patterns may be secured with lines which vary considerably from the perpendicular relationship. However, the perpendicular relationship does provide a maximum distinction between the foreground and background areas and makes them more readily observable.
Abstract
Description
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US06/655,713 US4715623A (en) | 1984-09-28 | 1984-09-28 | Documents having a revealable concealed identifier and the method of making such documents |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/655,713 US4715623A (en) | 1984-09-28 | 1984-09-28 | Documents having a revealable concealed identifier and the method of making such documents |
Publications (1)
Publication Number | Publication Date |
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US4715623A true US4715623A (en) | 1987-12-29 |
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ID=24630058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US06/655,713 Expired - Lifetime US4715623A (en) | 1984-09-28 | 1984-09-28 | Documents having a revealable concealed identifier and the method of making such documents |
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US (1) | US4715623A (en) |
Cited By (69)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988005387A1 (en) * | 1987-01-13 | 1988-07-28 | Mancuso Robert J | Variable color print and method of making same |
US4813712A (en) * | 1986-12-11 | 1989-03-21 | Blockfoil Limited | Indicating the condition of a surface |
WO1990002658A1 (en) * | 1988-09-09 | 1990-03-22 | The De La Rue Company Plc | Security device |
US5005873A (en) * | 1986-04-07 | 1991-04-09 | West Michael A | Marking of articles |
EP0429782A1 (en) * | 1989-12-01 | 1991-06-05 | Landis & Gyr Technology Innovation AG | Arrangement for improving the falsification safety of a document of value |
US5074596A (en) * | 1989-02-23 | 1991-12-24 | De La Rue Giori S.A. | Currency paper, especially bank note, with a safety design and process for producing it |
US5199744A (en) * | 1988-09-09 | 1993-04-06 | De La Rue Plc | Security device |
EP0642933A1 (en) * | 1992-06-04 | 1995-03-15 | JAPAN as represented by DIRECTOR-GENERAL, PRINTING BUREAU, MINISTRY OF FINANCE | Printed matter and printing method |
US5403040A (en) * | 1992-03-30 | 1995-04-04 | The Standard Register Company | Optically variable and machine-readable device for use on security documents |
US5468581A (en) * | 1993-11-04 | 1995-11-21 | Moore Business Forms, Inc. | Verification latent image |
US5490457A (en) * | 1992-04-03 | 1996-02-13 | Johnson & Johnson Inc. | Method and apparatus for printing a fibrous web |
EP0710183A1 (en) * | 1993-06-08 | 1996-05-08 | Reserve Bank Of Australia | Embossing of banknotes or the like with security devices |
WO1996019357A1 (en) * | 1994-12-20 | 1996-06-27 | Oranmay Investments B.V. | Method for embossing paper |
US5582103A (en) * | 1992-06-04 | 1996-12-10 | Director-General, Printing Bureau, Ministry Of Finance, Japan | Method for making an anti-counterfeit latent image formation object for bills, credit cards, etc. |
US5593017A (en) * | 1994-03-18 | 1997-01-14 | Environmental Products Corporation | Method and apparatus for identifying information contained in surface deviations |
EP0687771A3 (en) * | 1994-06-14 | 1997-05-21 | Wiggins Teape Group Ltd | Security paper |
US5722693A (en) * | 1996-10-03 | 1998-03-03 | Wicker; Kenneth M. | Embossed document protection methods and products |
WO1998020382A1 (en) * | 1996-11-07 | 1998-05-14 | Fryco Limited | Optical images |
US5772248A (en) * | 1995-12-07 | 1998-06-30 | Verify First Technologies, Inc. | Document with tamper and counterfeit resistant relief markings |
US5792545A (en) * | 1994-02-04 | 1998-08-11 | Dai Nippon Printing Co., Ltd. | Decorative paper/embossing plate in which uneven structure of vessel perforation is reproduced, and preparing method and preparing apparatus therefor |
US5808758A (en) * | 1994-12-23 | 1998-09-15 | Geisecke & Devrient, Gmbh | Data carrier with an optically variable element |
US5853197A (en) * | 1996-03-05 | 1998-12-29 | The Standard Register Company | Security document |
US5873604A (en) * | 1995-05-25 | 1999-02-23 | Verify First Technologies, Inc. | Document security system having thermo-activated pantograph and validation mark |
WO1999048697A1 (en) * | 1998-03-20 | 1999-09-30 | De La Rue International Limited | Latent image structure |
US5991078A (en) * | 1992-08-19 | 1999-11-23 | Dai Nippon Printing Co., Ltd. | Display medium employing diffraction grating and method of producing diffraction grating assembly |
US6036233A (en) * | 1995-11-03 | 2000-03-14 | Giesecke & Devrient Gmbh | Data carrier with an optically variable element |
WO2000045344A1 (en) * | 1999-01-26 | 2000-08-03 | The Governor And Company Of The Bank Of England | Substrates for printing |
US6176521B1 (en) * | 1998-01-16 | 2001-01-23 | Robert J. Mancuso | Variable color print with locally colored regions and method of making same |
US6297508B1 (en) | 1998-08-10 | 2001-10-02 | Cryovac Inc. | Method of determining authenticity of a packaged product |
US20030030271A1 (en) * | 2001-08-02 | 2003-02-13 | Wicker Thomas M. | Security documents and a method and apparatus for printing and authenticating such documents |
US6659508B1 (en) * | 1999-06-25 | 2003-12-09 | Note Printing Australia Limited | Security documents |
US20040050269A1 (en) * | 2000-09-08 | 2004-03-18 | Roger Adamczyk | Data carrier, method for the production thereof and gravure printing plate |
US20040061325A1 (en) * | 2002-09-24 | 2004-04-01 | Canadian Bank Note Company, Limited | Printed security device and method |
WO2004030928A1 (en) * | 2002-10-07 | 2004-04-15 | Note Printing Australia Limited | Embossed optically variable devices |
NL1021905C2 (en) * | 2002-11-12 | 2004-05-26 | Konink Nl Munt N V | Coin image constructed from characteristics. |
US20040188528A1 (en) * | 2003-03-27 | 2004-09-30 | Graphic Security Systems Corporation | System and method for authenticating objects |
US20040195823A1 (en) * | 2001-08-06 | 2004-10-07 | Takao Yokote | Authenticatable printed matter and its production method |
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